|Publication number||US8181197 B2|
|Application number||US 12/027,184|
|Publication date||May 15, 2012|
|Priority date||Feb 6, 2008|
|Also published as||EP2260452A2, EP2260452A4, US8826320, US20090199251, US20140130080, WO2009100388A2, WO2009100388A3|
|Publication number||027184, 12027184, US 8181197 B2, US 8181197B2, US-B2-8181197, US8181197 B2, US8181197B2|
|Inventors||Mihai Badoiu, Shanmugavelayutham Muthukrishnan|
|Original Assignee||Google Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (54), Non-Patent Citations (56), Referenced by (1), Classifications (14), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The disclosed embodiments relate generally to the management and display of votes for popular intervals within video programs.
The proliferation of video sharing through websites provides numerous opportunities to collaborate and experience videos in online communities. Video hosting websites allow users to upload, view, and rate videos. Users browsing a video hosting website can locate videos of interest by, for example, searching for videos, browsing directories, or sorting by ratings.
User rating of videos provides a way to complement video with useful information. However, because user ratings are for an entire video, it is difficult to know which portions of the video the users found particularly interesting. In addition, there is no way to navigate videos to find the most popular portions of the video. Although a user may wish to view only the most popular portions of the video, the user has to view the entire video because the most popular parts of the video have not been determined.
The present invention includes systems and methods for identifying popular intervals in online hosted videos. Users vote on intervals within various videos stored in an online video hosting website. To determine popular intervals associated with a video, the votes for one or more intervals of the video are collected and organized into groups. Each group includes votes for intervals of the video that are similar to each other. A group having the highest number of votes is identified, and a most popular clip of the video is formed based upon the intervals in the group. This process can be expanded to determine any number of groups in a given video having a first, second, third, or other number of highest number of votes as desired, forming the respective popular intervals within a single video, and across multiple videos, to identify the popular intervals within a large number of different videos.
Groups can be formed in a variety of ways. For example, votes can be clustered into groups based on a timestamp associated with each vote. Also, votes can be clustered based on the start times and the end times of the intervals. Groups can be associated with identified scenes or features in the video. In addition, groups can be formed based on a determination of the maximum number of indications of popular clips that can be visually distinguished on a timeline corresponding to the video. The amount of time between intervals can also be taken into account in forming the groups.
A system determines popular intervals associated with a video. The system includes various modules. An extraction module extracts a plurality of votes associated with one or more intervals of the video. The grouping module forms a plurality of groups, each including votes for similar intervals of the video. The vote determination module determines a group having the highest number of votes, and the clip generation module forms a most popular clip of the video based upon the intervals in the group.
The features and advantages described in this summary and the following detailed description are not all-inclusive. Many additional features and advantages will be apparent to one of ordinary skill in the art in view of the drawings, specification, and claims presented herein.
The figures depict various embodiments of the present invention for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the invention described herein.
A client 130 executes a browser 132, and connects to the front end server 124 via a network 105, which is typically the Internet, but may also be any network, including but not limited to a LAN, a MAN, a WAN, a mobile, wired or wireless network, a private network, or a virtual private network. While only a single client 130 and browser 132 are shown, it is understood that very large numbers (e.g., millions) of clients are supported and can be in communication with the website 108 at any time. The client 130 may include a variety of different computing devices. Examples of client devices 130 are personal computers, digital assistants, personal digital assistants, cellular phones, mobile phones, smart phones or laptop computers. As will be obvious to one of ordinary skill in the art, the present invention is not limited to the devices listed above.
In some embodiments, the browser 132 includes an embedded video player 134 such as, for example, the Flash™ player from Adobe Systems, Inc. or any other player adapted for the video file formats used in the video hosting website 108. A user can access a video from the video hosting website 108 by browsing a catalog of videos, conducting searches on keywords, reviewing play lists from other users or the system administrator (e.g., collections of videos forming channels), or viewing videos associated with particular user group (e.g., communities).
Video server 126 receives uploaded media content from content providers and allows content to be viewed by client 130. Content may be uploaded to video server 126 via the Internet from a personal computer, through a cellular network from a telephone or PDA, or by other means for transferring data over network 105 known to those of ordinary skill in the art. Content may be downloaded from video server 126 in a similar manner; in one embodiment media content is provided as a file download to a client 130; in an alternative embodiment, media content is streamed client 130. The means by which media content is received by video server 126 need not match the means by which it is delivered to client 130. For example, a content provider may upload a video via a browser on a personal computer, whereas client 130 may view that video as a stream sent to a PDA. Note also that video server 126 may itself serve as the content provider.
Users of clients 130 can also search for videos based on keywords, tags or other metadata. These requests are received as queries by the front end server 124 and provided to the video server 126, which is responsible for searching the video database 128 for videos that satisfy the user queries. The video server 126 supports searching on any fielded data for a video, including its title, description, tags, author, category and so forth.
Users of the clients 130 and browser 132 can upload content to the video hosting website 108 via network 105. The uploaded content can include, for example, video, audio or a combination of video and audio. The uploaded content is processed and stored in the video database 128. This processing can include format conversion (transcoding), compression, metadata tagging, and other data processing. An uploaded content file is associated with the uploading user, and so the user's account record is updated in the user database 140 as needed.
For purposes of convenience and the description of one embodiment, the uploaded content will be referred to a “videos”, “video files”, or “video items”, but no limitation on the types of content that can be uploaded are intended by this terminology. Each uploaded video is assigned a video identifier when it is processed.
The video database 128 is used to store the received videos. The video database 128 stores video content and associated metadata, provided by their respective content owners. The video files have metadata associated with each file such as a video ID, artist, video title, label, genre, and time length.
Information about the votes received is stored in the user database 140. The user database 140 is responsible for maintaining a record of all users viewing videos on the website. Each individual user is assigned a user ID. The user ID can be based on any identifying information, such as the user's IP address, user name, or the like. The user database may also contain information about the reputation of the user in both the video context, as well as through other applications, such as the use of email or text messaging.
A video access log 129 within video database 128 stores each instance of video access. Votes can be submitted by clicking on an indicator or on a portion of a time line associated with the video. Users may also click and drag on the time line to specify a vote for a longer interval of video. Users may also submit votes via a digital video recorder (DVR) or with a device providing similar functionality, such as by using a remote control configured to allow entry of votes through a user interface associated with the device. Each entry in the access log 129 identifies a video being accessed, a time of access, an IP address of the user, a user ID if available, cookies, search queries, data identifying the type of interaction with the video, and the time of every interaction with the video. Interaction types can include any user interactions in the user interface of the website 108, such as playing, pausing, rewinding, forwarding and submitting votes or ratings for a video.
Turning now to
Users can indicate a vote for an interval of video in various ways. For example, users can click the “C” button 304 when they view an interval of video on which they wish to vote. Users can also click and hold the “C” button 304 to indicate an interval longer than one click. As another option, users can click the “C” button 304 to mark the start time of an interval and click the “C” button 304 again to indicate the end of an interval on which they are voting. The depiction in
The modules 110-120 of
The grouping module 112 forms 220 groups containing votes for similar intervals of the video. The groups of votes within a block of votes may be formed by a variety of methods. For example, the grouping module 112 forms a plurality of groups by clustering votes based on a timestamp associated with each vote. If the votes have timestamps within a specified time limit of each other, the grouping module determines that they relate to similar intervals of video and are clustered. For example, votes that have a timestamp within 5 seconds of each other are determined to refer to similar intervals. For example, some users may timestamp an action at its beginning, some at its climax and some immediately after it finishes. Using this technique, these votes would be grouped together.
In another embodiment, the votes are clustered based on the start times and the end times of the intervals. For example, if there is sufficient overlap (e.g. 25%) between intervals (bounded by the start times and the end times of the intervals with which the votes are associated), the grouping module 112 determines that the votes relate to similar intervals of the video. This allows for votes to be grouped even where the intervals to which they are associated are not identical.
Various methods for clustering the votes may be used. Some examples of well-known clustering methods include k-means or k-center clustering.
In another embodiment, the grouping module 112 forms groups by determining an amount of time between the intervals with which the votes are associated. If a sufficient amount of time exists between intervals (for example, 30 seconds), grouping module 112 forms a new group for the votes associated with the intervals. For instance, if only 5 seconds exists between two intervals in question in a 10 minute video, grouping module could decline to form new group for the intervals.
Another way grouping module 112 forms groups is by identifying a plurality of scenes or features in a video and associating each group with one or more scenes or features. A feature is a succinct representation of the content of one or more frames of video that are similar. For example, the grouping module 112 may group the frames into logical units, such as scenes or shots. The grouping module 112 may use scene detection algorithms to group the frames automatically. One scene detection algorithm is described in Naphade, M. R., et al., “A High-Performance Shot Boundary Detection Algorithm Using Multiple Cues”, 1998 International Conference on Image Processing (Oct. 4-7 1998), vol. 1, pp. 884-887, which is incorporated by reference herein, though there are many scene detection algorithms known in the art that can be used equally as well. The grouping module would then determine which scenes had the highest number of votes in determining the popular intervals.
Thus, the grouping module 112 can compute one feature set for all frames that belong to the same scene. The feature can be, for example, a description of a characteristic in the time, spatial, or frequency domains. For example, votes can be associated with a specific frame, and can describe that frame by its time, position, and frequency domain characteristics. The grouping module 112 can use any technique for determining features of video, such as those described in Zabih, R., Miller, J., and Mai, K., “Feature-Based Algorithms for Detecting and Classifying Scene Breaks”, Proc. ACM Multimedia 95, San Francisco, Calif. (Nov. 1993), pp. 189-200; Arman, F., Hsu, A., and Chiu, M-Y., “Image Processing on Encoded Video Sequences”, Multimedia Systems (1994), vol. 1, no. 5, pp. 211-219; Ford, R. M., et al., “Metrics for Shot Boundary Detection in Digital Video Sequences”, Multimedia Systems 2000), vol. 8, pp. 37-46, all of the foregoing being incorporated by reference herein. One of ordinary skill in the art would recognize various techniques for determining features of video.
In another embodiment, the grouping module 112 forms groups by determining a maximum number of indications of popular clips that can be visually distinguished on a timeline corresponding to the video. For example, a long video may have a large number of votes associated with a variety of intervals. Indications of popular clips might be difficult to visually distinguish on the timeline due to limitation on the image size and resolution. As such, more groups may be needed for a longer video than for a shorter video. In light of the difficulty of visually distinguishing large numbers of indications of popular clips on a timeline, grouping module 112 can set a maximum amount of groups that it will form based on this visual indication. Thus, even though there may be more than, for example, 10 popular clips, grouping module 112 may limit the indications displayed to the 10 most popular clips in a given video. In addition, grouping module 112 can also limit an action-packed short video to a maximum number of popular clips to ease visual distinction of the indications on a time line as well.
For a given video, the vote determination module 114 determines 230 a group having the highest number of votes in a variety of ways. For example, vote determination module 114 assigns a weight to each vote based on whether the vote was provided by a unique user and determines the group based on the assigned weights of the votes. Thus, the group may be determined to have the highest number of votes based on the weight assigned to each vote, rather than the absolute number of votes received. In another embodiment, vote determination module 114 assigns a weight to each vote based on the reputation score associated with the vote. A vote may be associated with a reputation score, for example, based on whether the vote was submitted by a new or unrecognized user, the usefulness of the votes previously submitted by the user, or other information about the user within user database 140.
Vote determination module 114 determines a group having the second highest number of votes similarly to the determination of the highest number of votes described above. This allows for the first and second most popular clips to be formed for a given video. This method can be expanded to allow vote determination module 114 to determine any number of groups in a given video having a first, second, third or other number of highest number of votes as desired.
The clip generation module 116 is adapted to form 240 a clip of a video based on the intervals in a given group. There are various ways to form clips. In one embodiment, the clip generation module 116 examines only the start time of the intervals that have received votes. Thus, all of the considered intervals will start at some time instant within the video and continue to the end of the video. Alternatively, clip generation module 116 may consider both start and end times for intervals that have received votes. Clip generation module 116 can then use these times to determine the earliest (or latest) point of any interval in the group and round it to the start of the scene just before (or after) it.
In another embodiment, clip generation module 116 projects the contribution of each of the intervals in the group on a time line, such as by adding the weight of the votes for each interval, or the logarithm of the number of votes for each time instant. The clip generation module 116 then fits a probabilistic model to the distribution (e.g., Gaussian distribution) of votes on the time line by standard statistical methods, and then selects the mean as the center. The clip generation module 116 can then select a certain number (e.g., three) of standard deviations to either side of the mean to identify an initial start and end time for the clip, and then adjusts these start and end times to the nearest scene boundaries.
In another embodiment, the clip generation module 116 examines traffic traces to determine how much each instant of the video was watched by different users, which may include those who have not voted. This information can also be used in conjunction with the above methods to determine where a clip should begin and end. In one embodiment, the instances of video that have received the most traffic within a given time period are considered to be part of the same clip and are used in determining the length of the clip.
For example, assume a 3:00 minute video depicts an actor on a motorcycle performing a stunt, such as jumping over a shark in the water, with the apex of the jump taking place at 2:00. One vote might be for an interval from two seconds prior to and two seconds after the jump (e.g. 1:58-2:02); another vote might be for the apex of the jump (e.g. 2:00); a third vote might be for the interval lasting from before the jump until after the motorcycle has safely landed (e.g. 1:50-2:10). Based on these intervals, clip generation module 116 forms the popular clip (e.g. 1:54-2:06). In this example, clip generation module forms the popular clip by averaging the time within the intervals associated with the three votes.
The ranking module 120 ranks popular clips based on the votes in each group. The ranking module 120 also ranks popular clips across multiple videos. As can be appreciated, the various modules can determine the popular clip(s) in any number of videos to identify the most popular clips overall. The ranking module 120 can be used in conjunction with video searching as well, such that videos that are determined to be responsive to a search query can be ranked based on the votes for groups for each responsive video. In one embodiment, the ranking module 120 determines the rank of the videos as a function of the number of votes for the most popular interval in each video. In another embodiment, the ranking module 120 determines the rank of the videos as a function of the total number of votes received for all groups within each video.
The display module 118 provides for the display of an indication of popular clips on a timeline associated with the videos. This allows a user to efficiently understand and access the most popular clips in one or more videos. The display module 118 can also create a highlights segment or trailer of a given video by forming an excerpt of a video that includes a first popular clip and a second popular clip and displaying the excerpt.
The videos database 128 stores lists of the videos with the most popular clips. The lists may be grouped by genre, rating, or any other property. The lists of related videos are updated hourly, in one example, by performing an analysis of voting activity from user database 140. Once the lists of the most popular clips have been generated, the video server 126 extracts the videos from the video database 128 based on the lists and provides the videos to users for viewing.
Turning now to
In another embodiment, users can access the most popular clips for videos using a DVR or a device providing similar functionality. By using a remote control or a viewing default, users of a device can access the most popular clips within a single video and across multiple videos. This would allow users to view the highlights of a given video or set of videos (such as the sports highlights for a given time period).
The ranked list of popular clips for all videos is stored in the video database 128. The ranked list of video clips is updated on an hourly basis, according to one embodiment. This ensures the most up to date relevant videos is presented to users. The ranked list may also be updated on a daily basis. The time in which the ranked list is updated is merely illustrative of the times in which an appropriate update can take place and the update can occur at any suitable time set by the administrator of the video hosting website 108.
Reference in the specification to “one embodiment” or to “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.
It should be noted that the process steps and instructions of the present invention can be embodied in software, firmware or hardware, and when embodied in software, can be downloaded to reside on and be operated from different platforms used by a variety of operating systems.
The present invention also relates to an apparatus for performing the operations herein. This apparatus may be specially constructed for the required purposes, or it may comprise a general-purpose computer selectively activated or reconfigured by a computer program stored in the computer. Such a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs), EPROMs, EEPROMs, magnetic or optical cards, application specific integrated circuits (ASICs), or any type of media suitable for storing electronic instructions, and each coupled to a computer system bus. Furthermore, the computers referred to in the specification may include a single processor or may be architectures employing multiple processor designs for increased computing capability.
The algorithms and displays presented herein are not inherently related to any particular computer or other apparatus. Various general-purpose systems may also be used with programs in accordance with the teachings herein, or it may prove convenient to construct more specialized apparatus to perform the required method steps. The required structure for a variety of these systems will appear from the description below. In addition, the present invention is not described with reference to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any references below to specific languages are provided for disclosure of enablement and best mode of the present invention.
While the invention has been particularly shown and described with reference to a preferred embodiment and several alternate embodiments, it will be understood by persons skilled in the relevant art that various changes in form and details can be made therein without departing from the spirit and scope of the invention.
Finally, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, the disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
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|Citing Patent||Filing date||Publication date||Applicant||Title|
|US20120159329 *||Jun 21, 2012||Yahoo! Inc.||System for creating anchors for media content|
|Cooperative Classification||G06Q30/0282, G06Q30/0278, H04N21/23109, H04N21/4756, G06Q30/02, G06F17/30867|
|European Classification||H04N21/475R, H04N21/231D, G06F17/30W1F, G06Q30/02, G06Q30/0282, G06Q30/0278|
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